AC Delco 606755 Speedometer and Tachometer Printed Circuit Board

This printed circuit board (PCB) serves as the core electrical substrate for the speedometer and tachometer gauge cluster in Chevrolet Corvette C3 models manufactured between 1978 and 1982. The assembly integrates the signal conditioning circuitry for the vehicle speed sensor and engine RPM signals, driving the respective analog gauge movements. Constructed on FR4 fiberglass epoxy laminate with copper traces, the board features edge connector interfaces for mating with the instrument cluster housing and bulkhead connector. It replaces OEM part numbers 606755, 1018741, and 393126. The unit operates on 12V DC vehicle electrical system voltage. Designed to withstand under-dash thermal cycling and vibration environments typical of automotive applications. Direct plug-in installation requires no programming or calibration.